The Carceri came into the possession of St. Francis through the generosity of the Benedictines who, until his advent, had held unlimited sway in Umbria. Many churches, and we may say, almost all the hermitages of the surrounding country belonged to them. But their principal stronghold, built in the eleventh century, stood on the higher slopes of Mount Subasio, while the Carceri, lying a little to the west, was used by them probably as a place of retreat when wearied of monastic life. Both monastery and hermitage seem to have been quiet enough, and we only occasionally hear of the Benedictine monks starting off on a visit to some hermit of renowned sanctity, or going upon some errand of mercy among the peasants in the valley, whom they often surprised by marvellous though somewhat aimless miracles wrought for their edification. Then early in the fourteenth century these hermit monks of Mount Subasio suddenly found themselves in the midst of the fighting of a mediæval populace, for the Assisans, not slow to discover the great military importance of the Benedictine Abbey, wished to possess it. When the struggle between Guelph and Ghibelline was at its height, the monks were driven to take refuge in the town, while their home was taken possession of by the exiled party who used it as a fortress whence they could sally forth and harass the eastern approach to Assisi. Perpetual skirmishes took place beneath its walls until the roving adventurer Broglia di Trino, who had made himself master of the town in 1399, in a solemn council held at the Rocca Maggiore issued an edict that the Monastery of St. Benedict was to be razed to the ground, determining thus to deprive the turbulent nobles and their party of so sure a refuge in times of civil war. The solid walls and fine byzantine columns of what once was the most celebrated abbey in Umbria now remain much as in the mediæval days of their wreckage, and, until a few years ago when some repairs were made, the church was open for the mountain birds to nest in, and wild animals used it as their lair.